Mitsubishi Electric PKA-RP1.6GAL Quick start guide

SERVICE TECHNICAL GUIDE
CONTENTS
1. PAIRING TABLE OF THE INDOOR AND OUTDOOR UNIT·····2
2. SPECIFICATIONS FOR ELECTRICAL WORK ·························3
3. WIRING DIAGRAM·····································································6
4. REFRIGERANT SYSTEM DIAGRAM ······································15
5. HOW TO CHECK THE PARTS ················································24
6. MICROPROCESSOR CONTROL·············································33
7. INDOOR UNIT CONTROL························································39
8. OUTDOOR UNIT CONTROL····················································47
9. DIP SWITCH FUNCTION ·························································63
10. FUNCTION SETTING ·······························································76
11. TEST RUN • REPLACEMENT OPERATION
& EMERGENCY OPERATION···················································86
12. SELF-DIAGNOSIS····································································92
13. TEST POINT DIAGRAM·························································118
14. TROUBLESHOOTING····························································127
15. SYSTEM CONTROL·······························································131
<Indoor unit>
[Model names] [Service Ref.]
R410A
PLA-RP·AA PLA-RP·AA
PLA-RP·AA1
PLA-RP·AA.UK
PLA-RP·AA1.UK
PKA-RP·GAL PKA-RP·GAL
PKA-RP·FAL PKA-RP·FAL
PCA-RP·GA PCA-RP·GA
PEA-RP·EA PEA-RP·EA.TH-A
PEAD-RP·EA PEAD-RP·EA.UK
PEAD-RP·EA1.UK
PEAD-RP·GA PEAD-RP·GA.UK
<Outdoor unit>
[Model names] [Service Ref.]
No. OCT04
REVISED EDITION-A
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
PUHZ-RP·VHA PUHZ-RP·VHA
PUHZ-RP·VHA1
PUHZ-RP·VHA-A
PUHZ-RP·VHA1-A
Revision:
• PKA-RP•GAL, PKA-RP•FAL,
PCA-RP•GA, PEAD-RP•GA,
PUHZ-RP•VHA1and
PUHZ-RP•VHA1-A are added in
REVISED EDITION-A.
• Please void OCT04.
OCT04A-1.qxp 04.9.29 9:14 AM Page 1

2
1
PAIRING TABLE OF THE INDOOR AND OUTDOOR UNITS
Heat pump type
Outdoor unit
PUHZ-RP
PEAD-RP·EA.UK
PEAD-RP·EA1.UK
PLA-RP·AA.UK
PLA-RP·AA1.UK
PEAD-RP·GA.UK
PLA-RP·AA
PLA-RP·AA1
—
—
OC293
REVISED EDITION-B
OC297
REVISED EDITION-C
PKA-RP·GAL
OC301
REVISED EDITION-A
PKA-RP·FAL
OC305
PCA-RP·GA OC311
Indoor unit
Service
Manual No.
Service Ref. 45
Heat pump without electric heater
VHA VHA
VHA1
VHA
VHA1
VHA
VHA1
6
3
2 2.5
VHA VHA VHA
1.6
——
—
—
—
—
—
————
———
Heat pump type
Outdoor unit
PUHZ-RP
PEA-RP· EA.TH-A
PLA-RP·AA
PLA-RP·AA1
OC293
REVISED EDITION-B
OC299
REVISED EDITION-A
PKA-RP·FAL
PCA-RP·GA OC311
OC301
REVISED EDITION-A
Indoor unit
Service
Manual No.
Service Ref. 45
Heat pump without electric heater
VHA-A VHA-A
VHA1-A
VHA-A
VHA1-A
—
VHA-A
VHA1-A
—
6
3
OCT04A-1.qxp 04.9.29 9:14 AM Page 2

3
SPECIFICATIONS FOR ELECTRICAL WORK
2
2-1. Field electrical wiring(power wiring specifications)
PUHZ-RP•VHA
PUHZ-RP•VHA-A
Outdoor unit p ower supply
*1
*2
*3
*4
*4
*4
*4
Outdoor unit power supply earth
Indoor unit - Outdoor unit
Indoor unit - Outdoor unit earth
Remote controller - Indoor unit
Outdoor unit L-N
Indoor unit-Outdoor unit S1-S2
Indoor unit-Outdoor unit S2-S3
Remote controller - Indoor unit
16A
2 oMin. 1.5
1 oMin. 1.5
1 oMin. 2.5
25A
2 oMin. 2.5
1 oMin. 2.5
1 oMin. 2.5
32A
2 oMin. 4
1 oMin. 4
1 oMin. 2.5
40A
2 oMin. 6
1 oMin. 6
1 oMin. 2.5
Indoor unit model ~ / N (Single) 50Hz,
220-230-240V
2 o0.69 (Non-polar)
AC 220-230-240V
AC220-230-240V
DC24V
DC14V
Outdoor unit power supply
Outdoor unit input capacity
Main switch (Breaker)
Wiring
Wire No. osize (mm2)
Circuit
rating
RP1.6, 2V RP2.5, 3V RP4, 5V RP6V
3 o2.5 (polar)
*1 A breaker with at least 3mm contact separation in each poles shall be provided.
Use non-fuse breaker (NF) or earth leakage breaker (NV).
*2 Max. 50m Total Max, including all indoor/ indoor connection is 80m.
*3 10m wire is attached in the remote controller accessory.
*4 The figures are NOT always against the ground.
S3 terminal has DC24V against S2 terminal. However, between S3 and S1, these terminals are NOT electrically insulated
by the transformer or other device.
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Power supply cords and indoor/ Outdoor unit connecting cords shall not be lighter than polychloroprene
sheathed flexible cord. (design 254 IEC 57)
3. Install an earth longer and thicker than other cables.
1
2
S1
S2
S3
S1
S2
S3
Indoor/outdoor
unit connection
cable
Indoor
unit
Unit
power
supply
Outdoor
unit
Remote
controller
L
N
Grounding
L
N1 21 2
S1
Indoor
unit
S2
S3
S1
S2
S3
S1
S2
S3
Unit
power
supply Indoor/outdoor
unit connection
cable
Indoor
unit
Outdoor
unit
Remote
controller
Grounding
1
21
21
2
S1
S2
S3
S1
S2
S3
S1
S2
S3
S1
S2
S3
Indoor/outdoor
connection cable
Indoor
unit
Unit
power
supply
Indoor
unit
Indoor
unit
Outdoor
unit
Remote
controller
L
N
Grounding
1:1 system Synchronized twin and triple system Electrical wiring
• Synchronized twin
• Synchronized triple
OCT04A-1.qxp 04.9.29 9:14 AM Page 3

4
2-2. M-NET wiring method
(Points to notice)
(1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from
making an influence on the signal communication. Place them at intervals of more than 5cm. Do not put them in the same
conduit tube.
(2) Terminal block (TB7) for transmission wires should never be connected to 220~240V power supply. If it is connected,
electronic parts on M-NET p.c. board may be burn out.
(3) Use 2-core x 1.25mm2shield wire (CVVS, CPEVS) for the transmission wire. Transmission signals may not be sent or
received normally if different types of transmission wires are put together in the same multi-conductor cable. Never do this
because this may cause a malfunction.
It would be ok if M-NET wire (non-polar, 2-cores) is arranged in addition to the wiring for A-control.
(4) Ground only one of any appliances through M-NET transmission wire (shield wire). Communication error may occur due to
the influence of electromagnetic noise.
“Ed” error will appear on the LED display of outdoor unit.
“0403” error will appear on the central-control remote controller.
If there are more than two grounding spots on the shield wire, noise may enter into the shield wire because the ground wire
and shield wire form one circuit and the electric potential difference occurs due to the impedance difference among ground-
ing spots. In case of single spot grounding, noise does not enter into the shield wire because the ground wire and shield
wire do not form one circuit.
To avoid communication errors caused by noise, make sure to observe the single spot grounding method described in the
installation manual.
Group
remote
controller
Refrigerant
address 00
M-NET
address 01
A-control
remote
controller
A-control
remote
controller
A-control
remote
controller
Refrigerant
address 00
M-NET
address 02
Refrigerant
address 00
M-NET
address 03
Power
supply
unit for
transmission
wire
Central
remote
controller
M-NET transmission wire
✕Bad example (Multi spot grounding of shield wire)
Good example 1 (Single spot grounding of shield wire)
Power
supply
appliance M-NET type
outdoor unit
Central
remote
controller
Power
supply
appliance M-NET type
outdoor unit
M-NET type
outdoor unit M-NET type outdoor unit
M-NET transmission wire
M-NET type
outdoor unit M-NET type outdoor unit
Central
remote
controller
Power
supply
appliance M-NET type
outdoor unit
M-NET transmission wire
M-NET type
outdoor unit M-NET type outdoor unit
Good example 2 (Single spot grounding of shield wire)
OCT04A-1.qxp 04.9.29 9:14 AM Page 4

5
2-2-3. Regulations in address settings
In case of multiple grouping system, M-NET and refrigerant address settings should be done as explained in the above sec-
tion. Set the lowest number in the group for the outdoor unit whose refrigerant address is “00” as its M-NET address.
wRefrigerant addresses can be overlapped if they are in the different group.
wIn group B, M-NET address of the outdoor unit whose refrigerant address is “00” is not set to the minimum in the group. As
“3” is right for this situation, the setting is wrong. Taking group A as a good sample, set the minimum M-NET address in
the group for the outdoor unit whose refrigerant address is “00”.
2-2-1. M-NET address setting
In A-control models, M-NET address and refrigerant address should be set only for the outdoor unit. Similar to Free Combo
system, there is no need to set the address of outdoor unit and remote controller. To construct a central control system, the
setting of M-NET address should be conducted only upon the outdoor unit. The setting range should be 1 to 50 (the same as
that of the indoor unit in Free Combo system), and the address number should be consecutively set in a same group.
Address number can be set by using rotary switches
(SW11 for ones digit and SW12 for tens digit), which
is located on the M-NET board of outdoor unit.
(Factory setting: all addresses are set to “0”.)
2-2-2. Refrigerant address setting
In case of multiple grouping system (multiple refrigerant circuits in one group), indoor units should be connected by remote
controller wiring (TB5) and the refrigerant address needs to be set. Leave the refrigerant addresses to “00” if the group set-
ting is not conducted. Set the refrigerant address by using DIP SW1-3 to -6 on the outdoor controller board. [Factory setting:
all switches are OFF. (All refrigerant addresses are “00”.)]
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
12
~
50
M-NETAddress No. <Setting example>
Switng
setting
SW11
ones
digit
SW12
tens
digit
OFF
ON
123456123456123456123456123456123456123456123456
123456 123456 123456 123456 123456 123456 123456 123456
0
Refuigrant
address
OFF
ON
8
OFF
ON
1
OFF
ON
9
OFF
ON
10
OFF
ON
11
OFF
ON
12
OFF
ON
13
OFF
ON
14
OFF
ON
15
OFF
ON
2
OFF
ON
3
OFF
ON
4
OFF
ON
5
OFF
ON
6
OFF
ON
7
System
controller
A-control
remote
controller
Group A Group B Group C
A-control
remote
controller
TB5
A-control
remote
controller
Refrigerant
address 00
M-NET
address 01
Refrigerant
address 00
M-NET
address 02
Refrigerant
address 01
M-NET
address 03
Refrigerant
address 00
M-NET
address 04
Power
supply
unit for
transmission
wire
A-control
remote
controller
A-control
remote
controller
TB5
Group A Group B
Refrigerant
address 00
M-NET
address 01
Refrigerant
address 01
M-NET
address 02
Refrigerant
address 00
M-NET
address 04
Refrigerant
address 01
M-NET
address 03
Refrigerant
address 02
M-NET
address 05
System
controller
Power
supply
unit for
transmission
wire
●M-NET wiring
(1) Use 2-core x 1.25mm2shield wire for electric wires.
(Excluding the case connecting to system controller.)
(2) Connect the wire to the M-NET terminal block.Connect one core of the
transmission wire (non-polar) to A terminal and the other to B. Peel the
shield wire, twist the shield part to a string and connect it to S terminal.
(3) In the system which several outdoor units are being connected, the terminal
(A, B, S) on M-NET terminal block should be individually wired to the other
outdoor unit’s terminal, i.e. A to A, B to B and S to S.In this case, choose one of those outdoor units and drive a screw
to fix an ground wire on the plate as shown on the right figure.
Transmission
wire Shield part
M-NET
terminal
block Ground
wire
ABS
OCT04A-1.qxp 04.9.29 9:14 AM Page 5

6
3 WIRING DIAGRAM
[Servicing]
Fasten terminal of the terminal board "TB4" equips lock system.
To remove the fastened terminal, pull it while pressing the protruding portion (locking lever) of
the terminal. The fastened terminal protruding portion should face upward.
NOTES:
1.Since the outdoor side electric wiring may change be sure to
check the outdoor unit electric wiring for servicing.
2.Indoor and outdoor connecting wires are made with polarities, make
wiring matching terminal numbers (S1,S2,S3).
3.Symbols used in wiring diagram above are, :Connector, :Terminal (block).
Please set the voltage using
the remote controller.
For the setting method, please
refer to the indoor unit Installation
Manual.
TO OUTDOOR UNIT
C
TB4
H2
5
GRILLE
MV
MV
MV MV
55
5
5
PLA-RP4AA
PLA-RP4AA1
TRANSMISSION
WIRES DC12V
MODELS Manufacture Service board MODELS
Manufacture
Service board
SW1
BLK
BLK
BLK BLK
BLK
BLK
BLU BLU
TH5
12
PIPE
CN29
(BLK)
REMOCON
CN22
(BLU)
WIRELESS
CN90
(WHT)
SW1
SW2
SWE
VANE
CN6V
(WHT)
POWER
CN03
(RED)
POWER
CN2D
(WHT)
LIQUID
CN21
(WHT)
INTAKE
CN20
(RED)
D.SENSOR
CN31
(WHT)
D.HEATER
CNC (RED)
D.U.M
CNP
(BLU)
FAN
(WHT)
BRN
ORN
YLW
CONTROLLER BOARD
CN02 (WHT) OUTDOOR UNIT
CN01 (BLU)
CN2S(WHT)
BLK
WHT
YLW
ORN
BRN
YLW
YLW
YLW
YLW
BLK
RED
WHT
CNB
W.B
LED1
LED2
BZ
RU
SW1 SW2
X4
X4
J15
J22J21 J24J23
J22J21 J24J23
J22J21 J24J23
J22J21 J24J23
OFF
ON
OFF
ON
4321
OFF
ON
4321
OFF
ON
4321
OFF
ON
4321
4321
J21J22J23J24
PLA-RP3AA
PLA-RP3AA1
R.B
9
X1
X1
5
31
CN32
CN2LCN41
123
12315
TH1 2TB5
112
TB6
CN2
TH2
DS
3
2
1
DC14V
1
2
3
12
J11 J12 J13 J14
2
121
LED1LED2LED3
ZNR
DP
3
FC
531 1
1
2
ON
OFF
J21 J22 J23 J24
C
MF
I.B
321
P.B
F1
TB4
S1
S2
S3
PLA-RP1.6,2,2.5AA
PLA-RP3,4,5,6AA
PLA-RP3,4,5,6AA 1
1
J11J12J13J14
2
J15
345ON
OFF
SW2
PLA-RP5AA1
PLA-RP6AA
PLA-RP6AA1
MODELS
Manufacture
Service board
J22J21 J24J23 OFF
ON
OFF
ON
4321
4321
J21J22J23J24
PLA-RP5AA
PLA-RP1.6AA
PLA-RP2AA
PLA-RP2.5AA
10
5
9
8
4
7
6321
123
CONNECTOR (PROGRAM TIMER)
TRANSMISSION LINE)
TERMINAL BLOCK (REMOTE CONTROLLER
REMOTE CONTROLLER BOARD
(0:/15kΩ, 25:/5.4kΩDETECT)
COND./EVA. TEMPERATURE THERMISTOR
(0:/15kΩ, 25:/5.4kΩDETECT)
PIPE TEMPERATURE THERMISTOR/LIQUID
(0:/15kΩ, 25:/5.4kΩDETECT)
ROOM TEMPERATURE THERMISTOR
TRANSMISSION LINE)
TERMINAL BLOCK (REMOTE CONTROLLER
TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE)
CN2
TB6
R.B
TH5
TH2
TH1
TB5
TB4 DEW PREVENTION HEATERH2
W.B
SYMBOL NAME
WIRELESS REMOTE CONTROLLER BOARD
RECEIVING UNIT
BUZZER
LED (HOT ADJUST)
SWITCH (HEATING ON/OFF)
LED (RUN INDICATOR)
BZ
LED1
RU
LED2
SW1
SW2 SWITCH (COOLING ON/OFF)
SYMBOL SYMBOL NAME NAME
I.B
INDOOR POWER BOARD
FUSE (4A)
VARISTOR
INDOOR CONTROLLER BOARD
CN2L
CN32
CN41
SW1
SW2
SWE
X1
X4
FC
CONNECTOR (LOSSNAY)
CONNECTOR (REMOTE SWITCH)
CONNECTOR (HA TERMINAL-A)
JUMPER WIRE (MODEL SELECTION)
JUMPER WIRE (CAPACITY CORD)
SWITCH (EMERGENCY OPERATION)
RELAY (DRAIN PUMP)
RELAY (FAN MOTOR)
FAN PHASE CONTROL
C
CAPACITOR (FAN MOTOR)
MF FAN MOTOR
DP
DS DRAIN SENSOR
P.B
ZNR
F1 DRAIN PUMP
LED1
LED2 POWER SUPPLY (I.B)
POWER SUPPLY (I.B)
MV VANE MOTOR
LED3
TRANSMISSION (INDOOR-OUTDOOR)
[LEGEND]
PLA-RP1.6AA PLA-RP2AA PLA-RP2.5AA
PLA-RP1.6AA.UK PLA-RP2AA.UK PLA-RP2.5AA.UK
PLA-RP3AA PLA-RP4AA PLA-RP5AA PLA-RP6AA
PLA-RP3AA1PLA-RP4AA1PLA-RP5AA1PLA-RP6AA1
PLA-RP3AA.UK PLA-RP4AA.UK PLA-RP5AA.UK PLA-RP6AA.UK
PLA-RP3AA1.UK PLA-RP4AA1.UK PLA-RP5AA1.UK PLA-RP6AA1.UK
OCT04A-1.qxp 04.9.29 9:14 AM Page 6

7
PKA-RP1.6GAL PKA-RP2GAL
3.While pointing the remote controller toward the unit's
receiver, press the h button.
· The check code will be indicated by the number of times
that the buzzer sounds from the receiver section and the
number of blinks of the operation lamp.
4.While pointing the remote controller toward the unit's
receiver, press the ON/OFF button.
· Self-check mode is canceled.
▲
▼
An explanation of the wireless remote controller self checking operations,check codes,buzzer sounds and LED signals are given
below. For check codes and symptom see the table below please.
Triple beep
No sound
Sounds other than
above
Double beepo1
Single beepo2
Single beepo8
Single beepo6
Single beepo2
Single beepo1
Buzzer sound
No trouble generated in the past.
Check code
P1
P2 Abnormality of room temperature thermistor(TH1).
Symptom
Abnormality of pipe temperature thermistor/Liquid(TH2).
P6
P8
E6~EF
F1~F9
----
FFFF
Abnormality of signal transmission between indoor unit and outdoor unit
("EE" indicates abnormality of combination).
Freezing /overheating protection is working.
Abnormality of pipe temperature.
No corresponding unit.
P9 Abnormality of pipe temperature thermistor/ Cond./Eva.(TH5).
Abnormality in outdoor unit. Refer to outdoor unit wiring diagram.
U0~UL
Operation lamp
1SEC.FLASHo1
1SEC.FLASHo2
1SEC.FLASHo6
1SEC.FLASHo8
1SEC.FLASHo2
(0.4+0.4)SEC.FLASHo1
OFF
OFF
DIFFERENT FROM ABOVE
1.Press the CHECK button twice continuously.
· CHECK begins to light and refrigerant address display
"00" begins to blink.
· Start this operation from the status of remote controller
display turned off.
2.Press the TEMP , buttons.
· Set the refrigerant address of the indoor unit that is to
be self-diagnosed.
· Set the refrigerant address of outdoor unit by outdoor unit
dip switch "SW1".
(Refer to installation manual of outdoor unit for the detail.)
6MV
VANE
CN6V
(WHT)
TO OUTDOOR UNIT
9
[Self-diagnosis]
TERMINAL BLOCK(INDOOR/OUTDOOR
Manufacture Service board
J24J23J22J21 OFF
1ON 432
MODELS
2GAL
SW2
J24J23J22J21
Manufacture
OFF
1ON 432
Service board
MODELS
1.6GAL
SW1
Manufacture Service board
J15J14J13J12J11 OFF
ON
54321
BUZZERBZ
RU RECEIVING UNIT
WIRELESS REMOTE CONTROLLER BOARDW.B
REMOTE CONTROLLER BOARD(OPTION)R.B CN2
TB6 CONNECTOR(PROGRAM TIMER)
TRANSMISSION LINE)
TERMINAL BLOCK(REMOTE CONTROLLER
Please set the voltage using the
remote controller.
For the setting method,please refer to
the indoor unit Installation Manual.
9
TRANSMISSION(INDOOR-OUTDOOR)LED3
VANE MOTORMV
POWER SUPPLY(R.B)
POWER SUPPLY(I.B)
LED2
LED1
NOTES:
:Connector, :Terminal (block).
2.Indoor and outdoor connecting wires are made with polarities,make wiring matching terminal numbers(S1,S2,S3).
4.Symbols used in wiring diagram above are,
3.Make sure that the main power supply of the booster heater is independent.
1.Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing.
SWITCH(COOLING ON/OFF)SW2
SW1
LED2
LED1 LED(RUN INDICATOR)
SWITCH(HEATING ON/OFF)
LED(HOT ADJUST)
COND./EVA.TEMP.THERMISTOR
(0°C/15k",25°C/5.4k"DETECT)
NAME
TRANSMISSION LINE)(OPTION)
TERMINAL BLOCK(REMOTE CONTROLLER
TB5
F1
ZNR
P.B
PIPE TEMP.THERMISTOR/LIQUID
TH5
TH2
TH1 ROOM TEMP.THERMISTOR
(0°C/15k",25°C/5.4k"DETECT)
(0°C/15k",25°C/5.4k"DETECT)
CONNECTING LINE)
TB4
FAN MOTORMF CAPACITOR(FAN MOTOR)C
FAN PHASE CONTROL
RELAY(FAN MOTOR)
SWITCH(EMERGENCY OPERATION)
JUMPER WIRE(CAPACITY CORD)
JUMPER WIRE(MODEL SELECTION)
CONNECTOR(HA TERMINAL-A)
CONNECTOR(REMOTE SWITCH)
CONNECTOR(LOSSNAY)
FC
X4
SWE
SW2
SW1
CN41
CN32
CN2L INDOOR CONTROLLER BOARD
VARISTOR
FUSE(4A)
INDOOR POWER BOARD
I.B
NAME SYMBOL
NAME SYMBOLSYMBOL
ZNR
R.B
F1
OUTDOOR
CN01(BLU)
P.B
3
2
1
CONT.BOARD
CN02(WHT)
CN2S(WHT)
DC14V
CN2
TB6
21
1
TB5
2
FAN
(WHT)
LED3 LED2 LED1
INDOOR UNIT
12 12
J14 J13 J12 J11
OFF
ONSWE SW1SW2
21
D.SENSOR
CN31
(WHT)
INTAKE
CN20
(RED)
LIQUID
CN21
(WHT)
REMOCON
CN22
(BLU)
POWER
CN2D(WHT)
POWER
CN03
(RED)
123
1
2
3
2
1
1
I.B
TH1
5
MF
C
35
FC
13 21
321
CN41 CN2L
X4
J15
X4
TH2 TH5
PIPE
CN29
(BLK)
2
1
WIRELESS
CN90
(WHT)
RED
YLW
CN25 CN32
BRN
ORN
BRN
ORN
YLW WHT
BLK
WHT
BLK
TRANSMISSION WIRES DC12V
TB4S1
S2
S3
RECEIVER
RU
CNB
LED2
BZ
LED1 SW1SW2
W.B
J21 J22 J23 J24
21
HEATER
CN24
(YLW)
]
OCT04A-1.qxp 04.9.29 9:14 AM Page 7

8
P.B
MV
YLW
BRN
ORN
6
TB4
S1
S2
S3 TO OUTDOOR UNIT
DIFFERENT FROM ABOVE
OFF
OFF
(0.4+0.4)SEC.FLASH ✕1
1SEC.FLASH ✕2
1SEC.FLASH ✕8
1SEC.FLASH ✕6
1SEC.FLASH ✕2
1SEC.FLASH ✕1
Operation lamp
U0~UL Abnormality in outdoor unit. Refer to outdoor unit wiring diagram.
Abnormality of pipe temperature thermistor/ Condenser/Evaporator(TH5).
P9
9
No corresponding unit.
Abnormality of pipe temperature.
Freezing /overheating protection is working.
Abnormality of signal transmission between indoor unit and outdoor unit
("EE" indicates abnormality of combination).
FFFF
----
F1~F9
E6~EF
P8
P6
Abnormality of pipe temperature thermistor/Liquid(TH2).
Symptom
Abnormality of room temperature thermistor(TH1).
P2
P1
Check code
NOTES:
1.Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing.
2.Indoor and outdoor connecting wires are made with polarities, make wiring matching terminal numbers(S1, S2, S3).
3.Symbols used in wiring diagram above are, :Connector, :Terminal (block).
ZNR
VANE
CN6V
(WHT)
F1
OUTDOOR
CN01 (BLU)
3
2
1
CONT.BOARD
CN02 (WHT)
CN2S(WHT)
DC14V
1TB5
2
FAN
(WHT)
LED3LED2LED1
INDOOR UNIT
12 12
J14 J13 J12 J11
OFF
ONSWE SW1SW2
21
INTAKE
CN20
(RED)
LIQUID
CN21
(WHT)
REMOCON
CN22
(BLU)
POWER
CN2D (WHT)
POWER
CN03
(RED)
321
1
2
3
2
1
1
I.B
TH1
5
MF
C
35
FC
13 21
CN41 CN2L
X4
J15
X4
TH2 TH5
PIPE
CN29
(BLK)
21
WIRELESS
CN90
(WHT)
RED
CN25 CN32
BRN
ORN
YLW WHT
BLK
WHT
BLK
TRANSMISSION WIRES DC12V
RECEI
-VER
RU
CNB
LED2
BZ
LED1 SW1SW2
W.B
J21 J22 J23 J24
21
HEATER
CN24
(YLW)
No trouble generated in the past.
12
TB6
CN2
R.B
Please set the voltage
using the remote controller.
For the setting method,
please refer to the indoor
unit Installation Manual.
J24J23J22J21
OFF
1
ON
432
4FAL
J24J23J22J21
OFF
1
ON
432
3FAL
SW1
Manufacture
Service board
J15J14J13J12J11
OFF
ON
54321
SW2
J24J23J22J21
Manufacture
OFF
1
ON
432
Service board
MODELS
2.5FAL
P4 1SEC.FLASH ✕4 Abnormality of drain sensor(DS).
P5 1SEC.FLASH ✕5 Malfunction of drain-up machine.
TERMINAL BLOCK(INDOOR/OUTDOOR
BUZZERBZ
RU RECEIVING UNIT
WIRELESS REMOTE CONTROLLER BOARD W.B
REMOTE CONTROLLER BOARD(OPTION) R.B CN2
TB6 CONNECTOR(SCHEDULE TIMER)
TRANSMISSION LINE)
TERMINAL BLOCK(REMOTE CONTROLLER
TRANSMISSION(INDOOR-OUTDOOR)
LED3
VANE MOTORMV
POWER SUPPLY(R.B)
POWER SUPPLY(I.B)
LED2
LED1
SWITCH(COOLING ON/OFF)SW2
SW1
LED2
LED1 LED(RUN INDICATOR)
SWITCH(HEATING ON/OFF)
LED(HOT ADJUST)
CONDENSER / EVAPORATOR TEMPERATURE
THERMISTOR (0°C/15kΩ, 25°C/5.4kΩDETECT)
NAME
TRANSMISSION LINE)(OPTION)
TERMINAL BLOCK(REMOTE CONTROLLER TB5
F1
ZNR
P.B
PIPE TEMPERATURE THERMISTOR/LIQUID
TH5
TH2
TH1 ROOM TEMPERATURE THERMISTOR
(0°C/15kΩ, 25°C/5.4kΩDETECT)
(0°C/15kΩ, 25°C/5.4kΩDETECT)
CONNECTING LINE)
TB4
CAPACITOR(FAN MOTOR)C
FAN PHASE CONTROL
RELAY(FAN MOTOR)
SWITCH(EMERGENCY OPERATION)
JUMPER WIRE(CAPACITY CODE)
JUMPER WIRE(MODEL SELECTION)
CONNECTOR(HA TERMINAL-A)
CONNECTOR(REMOTE SWITCH)
CONNECTOR(LOSSNAY)
FC
X4
SWE
SW2
SW1
CN41
CN32
CN2LINDOOR CONTROLLER BOARD
VARISTOR
FUSE(4A)
INDOOR POWER BOARD
I.B
NAME SYMBOLNAME SYMBOLSYMBOL
MF FAN MOTOR
Buzzer sound
Single beep ✕1
Single beep ✕2
Single beep ✕4
Single beep ✕5
Single beep ✕6
Single beep ✕8
Single beep ✕2
Double beep ✕1
Sounds other than
above
No sound
Triple beep
[Self-diagnosis]
An explanation of the wireless remote controller self checking operations, check codes, buzzer sounds and LED signals are given
below. For check codes and symptom see the table below please.
1.Press the CHECK button twice continuously.
• CHECK begins to light and refrigerant address display
"00" begins to blink.
• Start this operation from the status of remote controller
display turned off.
2.Press the TEMP ▼, ▲buttons.
• Set the refrigerant address of the indoor unit that is to
be self-diagnosed.
• Set the refrigerant address of outdoor unit by outdoor unit
dip switch "SW1".
(Refer to installation manual of outdoor unit for the detail.)
3.While pointing the remote controller toward the unit's
receiver, press the h button.
• The check code will be indicated by the number of times
that the buzzer sounds from the receiver section and the
number of blinks of the operation lamp.
4.While pointing the remote controller toward the unit's
receiver, press the ON/OFF button.
• Self-check mode is canceled.
PKA-RP2.5FAL PKA-RP3FAL PKA-RP4FAL
OCT04A-1.qxp 04.9.29 9:14 AM Page 8

9
PCA-RP2GA PCA-RP2.5GA PCA-RP3GA
PCA-RP4GA PCA-RP5GA PCA-RP6GA
Service board
234
ON
1
OFF
234
ON
1
OFF
234
ON
1
OFF
234
ON
1
OFF
234
ON
1
OFF
OFF
ON
4321
Manufacture
<For service board>
<For manufacture>
OFF
ON
54321
J21
J21
J21
J21
J21
J21
J22
J22
J22
J22
J22
J22J23
J23
J23
J23
J23
J23
J24
J24
J24
J24
J24
J24
J15J14J13J12J11
MODELS SW1 SW2
2GA
2.5GA
3GA
4GA
5GA
6GA
[Self-diagnosis]
1.For details on how to operate self-diagnosis with the wireless
remote control,refer to the technical manuals etc.
[Emergency operation procedure]
1.When the wired remote control or the indoor unit microcomputer has failed,but all other
components work properly, if you set the switch(SWE) on the indoor control panel ON,the indoor
unit will begin Emergency Operation.
When Emergency Operation is activated, the indoor unit operates as follows:
(1)Indoor fan is running at high speed.
(2)Drain-up machine(optional) is working.
NOTES:
2.Indoor and outdoor connecting wires are made with polarities,make
wiring matching terminal numbers(S1,S2,S3).
4.Symbols used in wiring diagram above are,
3.Make sure that the main power supply of the booster heater is
independent.
1.Since the outdoor side electric wiring may change be sure to
check the outdoor unit electric wiring for servicing.
:Connector, : Terminal (block).
[Servicing]
CN31 DRAIN SENSOR
When installing drain-up
machine(Optional part).
WWhen installing optional
drain-up machine,disconnect
the CN31 jumper connector
and replace it with the
drain sensor(DS). Fasten terminal of the terminal board "TB4" equips lock system.
To remove the fastened terminal,pull it while pressing the protruding
portion(locking lever)of the terminal.The fastened terminal protruding
portion should face upward.
TRANSMISSION(INDOOR-OUTDOOR)LED3
VANE MOTORMV
POWER SUPPLY(R.B)
POWER SUPPLY(I.B)
LED2
LED1
SWITCH(COOLING ON/OFF)SW2
SW1
LED2
RU
BZ
W.B
LED(RUN INDICATOR)
SWITCH(HEATING ON/OFF)
LED(HOT ADJUST)
BUZZER
RECEIVING UNIT
WIRELESS REMOTE CONTROLLER BOARD(OPTION)
TERMINAL BLOCK(REMOTE CONTROLLER
TRANSMISSION LINE)
CONNECTOR(SCHEDULE TIMER)
REMOTE CONTROLLER BOARD
TB6
CN2
COND./EVA.TEMP.THERMISTOR
(0:/15k",25:/5.4k"DETECT)
NAME
R.B
DRAIN-UP MACHINE(OPTION)
TRANSMISSION LINE)
TERMINAL BLOCK(REMOTE CONTROLLER TB5
F1
ZNR
P.B
PIPE TEMP.THERMISTOR/LIQUID
TH5
TH2
TH1 ROOM TEMP.THERMISTOR
(0:/15k",25:/5.4k"DETECT)
(0:/15k",25:/5.4k"DETECT)
TERMINAL BLOCK(INDOOR/OUTDOOR CONNECTING LINE)
TB4 DRAIN SENSOR(OPTION)DS
DP
FAN MOTORMF CAPACITOR(FAN MOTOR)C
FAN PHASE CONTROL
RELAY(FAN MOTOR)
RELAY(DRAIN PUMP)
SWITCH(EMERGENCY OPERATION)
JUMPER WIRE(CAPACITY CORD)
JUMPER WIRE(MODEL SELECTION)
CONNECTOR(HA TERMINAL-A)
CONNECTOR(REMOTE SWITCH)
CONNECTOR(LOSSNAY)
FC
X4
X1
SWE
SW2
SW1
CN41
CN32
CN2L INDOOR CONTROLLER BOARD
VARISTOR
FUSE(4A)
INDOOR POWER BOARD NAME SYMBOLNAME SYMBOLSYMBOL
TB2 TERMINAL BLOCK(HEATER)
LED1
312
DS
(WHT)
12
TH1 TH2 TH5
BLK BLK
21
BLU BLK BLK BLU
R.B CN2
TB6
21
1
TB5
2
TRANSMISSION WIRES DC12V
Please set the voltage using
the remote controller.
For the setting method,
please refer to the indoor
unit Installation Manual.
I.B
D.SENSOR
CN31
(WHT)
INTAKE
CN20
(RED)
LIQUID
CN21
(WHT)
REMOCON
CN22
(BLU)
PIPE
CN29
(BLK)
12 12 2132121
SWE SW1SW2
OFF
ON
J14 J13 J12 J11 J15 J21 J22 J23 J24
FAN
(WHT)
FC
POWER
CN03
(RED)
D.U.M
CNP
(BLU)
X1
X4
X1X4
LED3LED2LED1
VANE
CN6V
(WHT)
POWER
CN2D(WHT)
WIRELESS
CN90
(WHT)
CN41 CN2L
CN25 CN32
513 21
BRN
ORN
YLW WHT
BLK
(OPTION)
1
DP
3
ZNR
F1
OUTDOOR
CN01(BLU)
P.B
3
2
1
CONT.BOARD
CN02(WHT)
CN2S(WHT)
DC14V
1
2
3
2
1YLW
BRN
ORN TO
OUTDOOR
UNIT
TB4
S1
S2
S3 }
RECEIVER
RU
CNB
LED2
BZ
LED1 SW1SW2
W.B
P4~P6 TYPE
6MV 6
MV
55
P2,P3 TYPE
9
6MV 6
INDOOR UNIT
123
1
I.B
MF
C
35
RED BLK
WHT
OCT04A-1.qxp 04.9.29 9:14 AM Page 9

10
PEA-RP3EA.TH-A PEA-RP5EA.TH-A
PEA-RP4EA.TH-A PEA-RP6EA.TH-A
TO OUTDOOR UNIT
12
TB6
R.B
562341
PIPE TEMPERATURE THERMISTOR/LIQUID
(0˚C/15kΩ, 25˚C/5.4kΩDETECT)
COND./EVA. TEMPERATURE THERMISTOR
(0˚C/15kΩ, 25˚C/5.4kΩDETECT)
ROOM TEMPERATURE THERMISTOR
(0˚C/15kΩ, 25˚C/5.4kΩDETECT)
TH5
TH2
TH1
CN24
NAME
SYMBOL NAME SYMBOL SYMBOL NAME
CN2
R.B CONNECTOR(PROGRAM TIMER)
REMOTE CONTROLLER BOARD
TERMINAL BLOCK(REMOTE
CONTROLLER TRANSMISSON LINE)
TB6
RELAY(FAN MOTOR)
X6
X5
X4
SWE
SW2
SW1
JUMPER WIRE(MODEL SELECTION)
JUMPER WIRE(CAPACITY CORD)
SWITCH(EMERGENCY OPERATION)
RELAY(FAN MOTOR)
RELAY(FAN MOTOR)
LED3
LED2 POWER SUPPLY(R.B)
TRANSMISSOION(INDOOR • OUTDOOR)
I.B CN2L
CN41
CN32
LED1
INDOOR CONTROLLER BOARD
CONNECTOR(LOSSNAY)
CONNECTOR(HA TERMINAL-A)
CONNECTOR(REMOTE SWITCH))
POWER SUPPLY(I.B)
FUSE(4A)
INDOOR POWER BOARD
VARISTOR
P.BF1
ZNR
CAPACITOR(FAN MOTOR)
FAN MOTOR
MF
TB4 TERMINAL BLOCK
(INDOOR/OUTDOOR CONNECTING LINE)
C
J21J22J23J24
J21J22J23J24
J21J22J23J24
J24J23J22
1
BLU 2
3
2
1
CN31
2
1
2
1
1
2
1
2
J24 J23 J22
P.B
ZNR
X4X5
X6 X5
X6
1357
RED
C
ORN
MF
1.Since the outdoor side electric wiring may change be sure to check the
outdoor unit electric wiring for servicing.
2.Indoor and outdoor connecting wires are made with polarities,make wiring
matching terminal numbers(S1,S2,S3).
3.Symbols used in wiring diagram above are, :Connector, :Terminal (block).
FAN
(WHT)
1.When pressing the CHECK switch twice on the remote controller,the unit
changes to the self-diagnosis mode and will display the check code by
LED(light Emitting Diode)
Refer to the right table for the check codes and abnormarities.
LED3 LED2 LED1
INDOOR UNIT
TRANSMISSION WIRE
DC12V
OFF
ON
4321
Manufacture
<For manufacture>
SW1
[Self diagnosis]
[NOTES]
J21
OFF
ONSWE
SW2
WIRELESS
INTAKE
CN20
(RED)
LIQUID
CN21
(WHT) REMOCON
CN22
(BLU)
CN90
(WHT)
POWER
CN2D
(WHT)
POWER
CN03
(RED)
S3
S2
S1
F1
OUTDOOR
CN01(BLU)
3
2
1
CONT.BOARD
CN02(WHT)
CN2S(WHT)
DC14V
1
2
3
2
1
TH1
CN2
TB5
I.B
TH2
513
CN41 CN2L
CN32
X4
BLK
BLU
BRN
WHT
YLW
ORN
BRN
WHT
BLK
YLW
ORN
BRN
SW1
J11 J12 J13 J14 J15
TB4
TH5
1
2
PIPE
CN29
(BLK)
BLU
SW2
MODELS
J14J13J12J11 J15
Service board
OFF
ON
4321
OFF
ON
4321
J21
OFF
ON
4321
3EA
4EA
5EA
6EA 123 5
ON
OFF
4
<For service board>
OCT04A-1.qxp 04.9.29 9:14 AM Page 10

11
PEAD-RP1.6EA.UK PEAD-RP2EA.UK PEAD-RP2.5EA.UK
PEAD-RP3EA.UK PEAD-RP4EA.UK PEAD-RP5EA.UK PEAD-RP6EA.UK
PEAD-RP3EA1.UK PEAD-RP4EA1.UK PEAD-RP5EA1.UK PEAD-RP6EA1.UK
OCT04A-1.qxp 04.9.29 9:14 AM Page 11

12
PEAD-RP2.5GA
PEAD-RP3GA
PEAD-RP4GA
OCT04A-1.qxp 04.9.29 9:14 AM Page 12

13
PUHZ-RP1.6VHA
PUHZ-RP2VHA
PUHZ-RP2.5VHA
PUHZ-RP3VHA
PUHZ-RP3VHA-A
MODELS
SW6
W1 MODEL SELECT
1.6V
2V
MODELS
SW6
2.5V
3V
1
ON
OFF 23456
1
ON
OFF 23456
1
ON
OFF 23456
1
ON
OFF 23456
W1
W2
W2 Only PUHZ-RP2.5, 3VHA.
OCT04A-1.qxp 04.9.29 9:14 AM Page 13

14
PUHZ-RP4VHA
PUHZ-RP5VHA
PUHZ-RP6VHA
PUHZ-RP4VHA1
PUHZ-RP5VHA1
PUHZ-RP6VHA1
PUHZ-RP4VHA-A
PUHZ-RP5VHA-A
PUHZ-RP6VHA-A
PUHZ-RP4VHA1-A
PUHZ-RP5VHA1-A
PUHZ-RP6VHA1-A
W1
MODELS
SW6
W1 MODEL SELECT
4V
5V
6V
1
ON
OFF 23456
1
ON
OFF 23456
1
ON
OFF 23456
Only PUHZ-RP4VHA1
PUHZ-RP5VHA1
PUHZ-RP6VHA1
OCT04A-1.qxp 04.9.29 9:14 AM Page 14

15
REFRIGERANT SYSTEM DIAGRAM
4
Measurement item
COOL: 2.3 ~ 3.0 HEAT: 2.0 ~ 3.2
0.55 ~ 1.0
50 ~ 100
-2 ~ +18
COOL: 27:HEAT: 20:
COOL: 8 ~ 20
HEAT: 30 ~ 50
COOL: 35 HEAT: 7
COOL: 40 ~ 50 HEAT: 0 ~ 5
Measurement method, remarks
Connect the pressure gauge to the high-pressure check valve.
Connect the pressure gauge to the low-pressure check valve.
Measured with piping surface thermometer.
Measured with piping surface thermometer.
Can be displayed on remote controller.
Measured with piping surface thermometer.
Measured with piping surface thermometer.
High pressure (MPa)
Low pressure (MPa)
Discharge pipe temperature (:)
Suction pipe temperature (:)
Indoor intake temperature (:)
Indoor outlet temperature (:)
Outdoor intake temperature (:)
Outdoor outlet temperature (:)
Pressure/temperature near JIS
standard operating conditions
A
B
C
D
E
F
G
H
Notes : The operation statuses vary depending on the compressor's operating frequency because units are inverter-type.
Outdoor
heat exchanger
Stop valve
(with service port)
Power
receiver
Linear
expansion
valve B Linear
expansion
valve A
4-way valve
Compressor
Ball valve
Indoor heat
exchanger
A
B
C
D
Overload operation
Standard operation
Permissible operation range
Normal operation range
0 0.2 0.4 0.6 0.8 1 1.2
Suction pressure (MPa)
Discharge pressure (MPa)
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
4-1. Checking operation statuses PUHZ-RP • HA
4-1-1. Measurement points and items
•The table and diagrams below show the measurement item for each measurement point, and the pressure and temperature
near the ISO T1 standard operating conditions.
•Measure the temperature and pressure of each part by following the descriptions in the table.
•Measurement time: Be sure to wait until the refrigerant circuit has stabilized (30 minutes to 1 hour) before taking
measurements.
4-1-2. Operation pressure ranges
OCT04A-1.qxp 04.9.29 9:14 AM Page 15

16
4-2. Refrigerant System Diagram
Pipe temperature
thermistor/liquid
(TH2)
Distributor
with strainer
#50
Condenser/evaporator
temperature thermistor
(TH5)
Room temperature
thermistor (TH1)
Refrigerant flow in cooling
Refrigerant flow in heating
Strainer
#50
Strainer
#50
Heat exchanger Refrigerant GAS pipe connection
(Flare)
Refrigerant LIQUID pipe connection
(Flare)
PLA-RP1.6AA PLA-RP2AA PLA-RP2.5AA
PLA-RP1.6AA.UK PLA-RP2AA.UK PLA-RP2.5AA.UK
PLA-RP3AA PLA-RP4AA PLA-RP5AA PLA-RP6AA
PLA-RP3AA.UK PLA-RP4AA.UK PLA-RP5AA.UK PLA-RP6AA.UK
PLA-RP3AA1PLA-RP4AA1PLA-RP5AA1PLA-RP6AA1
PLA-RP3AA1.UK PLA-RP4AA1.UK PLA-RP5AA1.UK PLA-RP6AA1.UK
PKA-RP1.6GAL PKA-RP2GAL
PKA-RP2.5FAL PKA-RP3FAL PKA-RP4FAL
PCA-RP2GA PCA-RP2.5GA
PCA-RP3GA PCA-RP4GA PCA-RP5GA PCA-RP6GA
PEA-RP3EA.TH-A PEA-RP4EA.TH-A PEA-RP5EA.TH-A PEA-RP6EA.TH-A
PEAD-RP1.6EA.UK PEAD-RP2EA.UK PEAD-RP2.5EA.UK
PEAD-RP3EA.UK PEAD-RP4EA.UK PEAD-RP5EA.UK PEAD-RP6EA.UK
PEAD-RP3EA1.UK PEAD-RP4EA1.UK PEAD-RP5EA1.UK PEAD-RP6EA1.UK
PEAD-RP2.5GA.UK PEAD-RP3GA.UK PEAD-RP4GA.UK
OCT04A-1.qxp 04.9.29 9:14 AM Page 16

17
PUHZ-RP2.5VHA
PUHZ-RP3VHA
PUHZ-RP3VHA-A
Distributor
Thermistor TH7
(Outdoor)
Heat exchanger
Refrigerant GAS pipe
connection(5/8F)
Refrigerant LIQUID pipe
connection(3/8F)
Stop valve
(with service port)
Strainer
#100
Power
receiver
Linear
expansion
valve B
Linear expansion valve A
Strainer
#100
Strainer
#100
Strainer
#100
Thermistor TH6
(Outdoor 2-phase pipe)
Thermistor TH3
(Outdoor pipe)
Service port
(Low pressure)
Service port
(High pressure)
High pressure
switch 63H
Bypass valve
Oil separator
Thermistor TH4
(Discharge)
Muffler
Strainer
#50 4-way valve
Compressor
Ball valve
Capillary tube
O.D.4.0OI.D.2.4OL500
Capillary tube
O.D.2.5OI.D.0.6OL1000
PUHZ-RP1.6VHA
PUHZ-RP2VHA
Thermistor TH7
(Outdoor)
Heat exchanger
Refrigerant GAS pipe
connection(1/2F)
Refrigerant LIQUID pipe
connection(1/4F)
Stop valve
Strainer
#100
Power
receiver
Linear
expansion valve B
Thermistor TH6
(Outdoor 2-phase pipe)
Thermistor TH3
(Outdoor pipe)
Service port
High pressure
switch 63H
Thermistor TH4
(Discharge)
Compressor
Strainer
#50
Solenoid valve
(Four-way valve)
Muffler Distributor
Linear expansion valve A
Strainer
#100
Muffler
Stop valve
(with service port)
OCT04A-1.qxp 04.9.29 9:14 AM Page 17

18
PUHZ-RP4VHA PUHZ-RP4VHA-A
PUHZ-RP5VHA PUHZ-RP5VHA-A
PUHZ-RP6VHA PUHZ-RP6VHA-A
Distributor
Thermistor TH7
(Outdoor)
Heat exchanger
Refrigerant GAS pipe
connection(5/8F)
Refrigerant LIQUID pipe
connection(3/8F)
Stop valve
(with service port)
Strainer
#100
Power
receiver
Linear
expansion valve B
Linear expansion valve A
Strainer
#100
Strainer
#100
Strainer
#100
Thermistor TH6
(Outdoor 2-phase pipe)
Thermistor TH3
(Outdoor pipe)
Service port
(Low pressure)
Service port
(High pressure)
High pressure
switch 63H
Replace filter
Thermistor TH4
(Discharge)
Compressor
Strainer
#50 Solenoid valve
(Four-way valve)
Capillary tube
(O.D.4.0OI.D.3.0OL200)O2pcs
Strainer
#100
Strainer
#100
Low pressure
switch 63L
Muffler
Ball valve
Restrictor
valve
Solenoid valve
(Bypass valve)
PUHZ-RP4VHA1PUHZ-RP4VHA1-A
PUHZ-RP5VHA1PUHZ-RP5VHA1-A
PUHZ-RP6VHA1PUHZ-RP6VHA1-A
Distributor
Thermistor TH7
(Outdoor)
Heat exchanger
Refrigerant GAS pipe
connection(5/8F)
Refrigerant LIQUID pipe
connection(3/8F)
Stop valve
(with service port)
Strainer
#100
Power
receiver
Linear
expansion valve B
Linear expansion valve A
Strainer
#100
Strainer
#100
Strainer
#100
Thermistor TH6
(Outdoor 2-phase pipe)
Thermistor TH3
(Outdoor pipe)
Service port
(Low pressure)
Service port
(High pressure)
High pressure
switch 63H
Replace filter
Thermistor TH4
(Discharge)
Compressor
Strainer
#50 Solenoid valve
(Four-way valve)
Strainer
#100
Strainer
#100
Low pressure
switch 63L
Muffler
Ball valve
Restrictor
valve
Solenoid valve
(Bypass valve)
OCT04A-1.qxp 04.9.29 9:14 AM Page 18

19
4-3. Applicable extension pipe for each model
4-3-1. 1:1 system
(a) Pipe length
(b) Adjusting the amount of refrigerant
• Additional refrigerant charge is not necessary for the pipe length up to 30 m. When the pipe length exceeds 30 m or service
(refrigerant replacement) is performed, charge proper amount of refrigerant for each pipe length referring to table below.
Use refrigerant R410A. Use charge hose exclusive for R410A.
• When charging additional refrigerant, charge the refrigerant from low-pressure side of the port valve using a safety charger.
• Make sure that air purge for this unit at refrigerant replacement is performed from both high-pressure check valve and ser-
vice port. (If air purge is performed only from one of them, air in not purged enough.)
• When replacing refrigerant, charge the refrigerant from service port. When charged refrigerant is less than specified amount,
charge the refrigerant again from low pressure side of the port valve using a safety charger.
• Tighten the service port cap (nut) of stop valve firmly. The tightening torque is 12 to 16 N·m. (For the prevention of slow-leak)
• Check additional refrigerant charging amount referring to table 4 when liquid pipe is one size larger than standard diameter,
and table 2 when the pipe is standard diameter.
15 30m or
above
31 — 40m
0.2kg
0.6Kg
0.6kg
10m or below
41 — 50m
0.4kg
1.2Kg
1.2kg
51 — 60m
—
—
1.8kg
61 — 75m
—
—
2.4kg
<Table 2> Additional refrigerant charging amount for pipe of standard diameter
<Table 3>
Outdoor unit Permitted
pipe length
Additional refrigerant charging amount for pipe
length exceeding 30 m (kg)
PUHZ-RP1.6, 2V
PUHZ-RP2.5, 3V
PUHZ-RP4-6V, RP4-6V1
Outdoor unit
PUHZ-RP1.6, 2V
PUHZ-RP2.5, 3V
PUHZ-RP4-6V
PUHZ-RP4-6V1
Number of
bends Height
difference
50m or less
50m or less
75m or less
Permitted
pipe length
50m or less
50m or less
75m or less
75m or less
2.1
3.1
5.1
4.6
11 — 20m 21 — 30m
2.3
3.3
5.3
4.8
2.5
3.5
5.5
5.0
31 — 40m
2.7
0.2
4.1
0.6
6.1
0.6
5.6
0.6
2.9
0.4
4.7
1.2
6.7
1.2
6.2
1.2
—
—
—
—
7.3
1.8
6.8
1.8
—
—
—
—
7.9
2.4
7.4
2.4
41 — 50m 51 — 60m 61 — 75m
Additional refrigerant charging amount for recharging (above) and pipe length exceeding 30m (below) (kg)
Liquid
pipe
(mm)
Gas
pipe
(mm)
[6.35 [9.52 [12.7
[9.52
OD
Thick-
ness
OD
Thick-
ness
RP1.6
RP2
RP2.5
RP3
RP4
RP5
RP6
t0.8
[12.7
t0.8
[15.88
t1.0
[12.7
t0.8
[15.88
t1.0
[19.05
t1.0
[15.88
t1.0
[19.05
t1.0
t0.8 t0.8
: Normal piping
: It can be used, however, additional refrigerant charge is required when the pipe length exceeds 20m. Refer to <table 4>.
: It cannot be used.
: It can be used.
: It can be used, however, the capacity is lowered. Refer to (c) Capacity correction.
<Table 1> Pipe length for 1:1 system
*1: Set DIP SW8-1 on outdoor unit controller board to ON.
*2: The maximum length is 50 m in case of using existing pipes.
*3: The height difference between indoor and outdoor unit should be kept within 30 m for all models.
[Marks in the table above]
50m
t0.8
30m 30m
10m 30m 30m
50m
30m
50m
50m
10m 50m (*1)
75m (*2)
50m
10m 30m 30m10m 50m
75m (*2)
75m (*2)
50m (*1)
30m (*1)
50m (*1)
50m (*1)
50m (*1)
50m (*1)
50m10m 30m 30m 30m (*1)
<Table 4> Additional refrigerant charging amount for liquid pipe which is one size larger than standard diameter
[9.52
[12.7
[12.7
RP1.6, 2
RP2.5, 3
RP4-6
Liquid pipe dia Chargeless 30m
30m
50m
60 g addition per 1 m when pipe length exceeds 20 m
100 g addition per 1 m when pipe length exceeds 20 m
100 g addition per 1 m when pipe length exceeds 20 m
20m
20m
20m
Max. pipe length
Additional refrigerant charging amount
OCT04A-1.qxp 04.9.29 9:14 AM Page 19

20
5 10152025303540455055
80
Capacity ratio [%]
Corrected pipe length
85
90
95
100
Heating RP1.6, RP2
Cooling RP1.6
Cooling RP2
100
95
90
85
80
75
70 5 101520253035404550556065707580
Note: The permitted pipe length is up to 55m for RP1.6, 2, 2.5, 3 model.
Cooling RP3 model
Cooling RP1.6, 2.5 models
Cooling RP2, 4 models
(Up to 55m for RP2
model)
Heating RP1.6, 2, 2.5,
3, 4, 5 and 6 models
(Up to 55m for RP1.6,
2, 2.5, 3 model)
Cooling RP5 model
Cooling RP6 model
Capacity ratio [%]
Corrected pipe length
(c) Capacity correction
Cooling and heating capacity is lowered according to pipe length. Capacity can be obtained by referring to the capacity
curves below. When the diameter of gas pipe is one size smaller than standard diameter, cooling capacity is lowered com-
paring to the standard diameter. The lowered capacity can be obtained by referring to capacity curves for gas pipe which is
one size smaller than standard size.
Corrected pipe length (m) = actual pipe length (m) + number of bends x 0.3 (m)
11Capacity curves for PUHZ-RP • HA model <Standard size>
22Capacity curve for PUHZ-RP1.6, 2 models
<When gas pipe is one size smaller than standard size>
Cooling
Heating
OCT04A-1.qxp 04.9.29 9:14 AM Page 20